When they sold YouTube to Google in 2006, Karim received 137,443 shares—worth more than $64 million at the time. Karim has kept a low profile since the acquisition, both in the tech world and on YouTube.

He hasn’t had any activity on his YouTube channel until now. He may have made millions off the sale to Google, but that doesn’t mean he necessarily agrees with the changes made over the years.

The most unpopular aspect of the changes, which allows content creators to moderate comments before publishing them and ranks comments by relevance, is that users no longer have anonymity on the site. In order to comment, they are required to login with a Google+ account.

The early outrage was enough for Subbable to add a commenting system to its site for users who don’t want to sign up for Google+.